Power-transmission mechanism.



H. W. SPELLMAN & G. E. OLMSTED.

POWER TRANSMISSION MECHANISM. APPLICATION FILED MAR. 18, 1909.

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PQWER TRANSMISSION MECHANISM.

APPLJGATION FILED MAR. 18', 1909.

' 969,214. Patented Sept. 6, 1910.

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H. W. SPELLMAN & G. B. OLMSTBD.

POWER TRANSMISSION MECHANISM.

' APPLIOATION FILED MAR. 18, 1909.

969,214, PatenteaSept. 6, 1910.

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HERBERT W. SPELLMAN AND CLARENCE E. OLMSTED, OF NEW BRITAIN, CONNECTI-OUT, ASSIGNORS TO LANDERS, FRARY AND CLARK, OF NEW BRITAIN, CONNECTI-OUT, A CORPORATION.

POWER-TRANSMISSION MECHANISM.

Specification of Letters Patent.

Patented Sept. 6, 1910.

Application filed March 18, 1909. Serial No. 484,123.

To all whom it may concern:

Be it known that we, HERBERT W. SPELL- MAN and CLARENCE E. OLMsTED,citizens of the United States, and residing at New Britain, in thecounty of Hartford and State of Connecticut, have invented certain newand useful Improvements in Power- Transmission Mechanism, of which thefollowing is a specification.

Our invention relates to improvements in electric meat cutters and theobjects of our improvements are simplicity and economy in construction,and convenience and efficiency in use.

In the accompanying drawing: Figure 1 is a side elevation of ourelectric meat cutter, in part broken out and in section. Fig. 2 is aplan view of the same. Fig. 3 is a section of a part of the same on linew x of Fig. 2. Fig. 4 is an end view of the same. Fig. 5 is a sectionalview of a part of the motor on the line a: at Fig. 2 on an enlargedscale. Fig. 6 is a sectional view of our electric meat cutter on theline 3 3 of Fig. 2.

A is a meat cutter, B an electric motor and C is a base plate by whichboth are supported. The meat cutter A may be of any desired type. Weprefer however, to use a meat cutter built in general on the lines ofthe one shown in the patent to Alonzo A. Warner, No. 908,714, Jan. 5,1909, replacing the hand operation by electric operation after themanner to be described herewith. The electric motor B may likewise be ofany general type, either-direct current or alter nating. We preferhowever a type of motor such as are found standard on the market adaptedto be mounted on the ceiling for reasons to be hereinafter disclosed.

The base plate 0 is the top plate of a boxlike base and is essentially aflat horizontal rectangle. The sides of the said base are supportingflanges projecting downwardly from the said base plate C. The electricmotor B is mounted essentially fixed and rigid in a so called invertedposition to the underneath side of the said base plate C by any suitablemeans, such as the screws 8, the

axis horizontal and essentially in the same vertical plane as thecentral line of the longest dimension of the rectangular base plate C.The said downwardly projecting flanges 7 serve as support for the entireapparatus and also as a lateral protection to the motor, and togetherwith the base plate C form a complete inclosure therefor. Accordinglythe motor may be of the so called open type as opposed to the closedtype with the advantage of greater power capacity and at the same timewill be fully and completely inclosed.

A hand hole closed by a cover 9 may be provided in the supporting flange7 if desired for facilitating access to the motor, as might be desirablein the case of a direct current motor for the purpose of givingnecessary attention to the commutator and brushes. Likewise any switchesor rheostats necessary for the control of the electric motor B may belet into the supporting flanges 7. Ve prefer however, to use a singleswitch and rheostat combined operated by a single button or handle 10,the same being fully inclosed so far as exposure of the exterior isconcerned and so mounted in the said flange 7 as not to vitiate theinclosed feature of the motor as has been described. The ordinary rearbearing support of the motor B is replaced by a special rear bearingsupport 11 to be hereinafter described.

The meat cutter A is complete and self contained so far as applies tothe strictly cutting mechanism and is supported on a pedestal providedwith a flanged foot 12 which fits with a dovetail joint in the sideflanges or guides 13 made integral with the upper side of the base plateC by means of which it is removably mounted on the said upper side ofthe said base plate G and is held in place by means of a single lockingscrew 14 screwed through a boss 15 on one of the guides 13, the endbearing against a socket in one side of the said flanged foot 12, thesaid socket affording a means of determining the correct location of themeat cutter A for proper conditions of operation and also insuring therigidity and reliability of the same with a minimum of pressure. Thesaid locking screw 14 is the only feature requiring attention so far astightening and loosening is concerned for the purpose of fixing the meatcutter A in position for the purpose of operating or for removing thesame.

The feature of removably coupling the meat cutter A to the drivingmechanism is effected by forming the end of the shaft 16 after the threesection arrangement shown in the patent referred to consistingessentially of an inner cylindrical section of full size, the secondsection with the sides squared, and the third, outermost sectioncylindrical and of reduced diameter, and providing a hollow driving gear17 for the said shaft with three corresponding sections to fit. Thecylindrical sections insure properalinement while the squared sectioninsures the union of the two parts for the transmission of rotarymotion. Accordingly, no set screws or special tightening devices arenecessary and at the same time the arts are removably united. The saiddriving gear 17 has on the outside also three sections consisting of thegear proper in the middle, with two cylindrical bearing portions, one oneach side, adapted to run in the bearings provided in the bracket 18 andcap 19 for the same. The inner side walls of the said bearings in thesaid bracket 18 and cap 19 prevent the displacement either laterally orin any other way of the driving gear 17 while the end of the shaft 16 ofthe meat cutter A is being removed from or replaced within the saiddriving gear 17.

Although the meat cutter A is removably mounted on the base plate C andreadily connected to and disconnected from the driving mechanism as hasbeen described, the same is during operation essentially directlyconnected to the motor by means of a train of suitable gearingcomprising a pair of preferably so called spiral gears at the meatcutter end and a worm wheel 22 and worm 23 at the motor end, with ashort counter shaft or gear shaft 20 between. The said spiral gearscomprise a spiral gear 21, mounted at the upper end of the said drivingshaft 20 which meshes with the driving gear 17 already described. Thesaid worm wheel 22 is mounted at the lower end of the said counter shaft20 and is driven by a worm 23 mounted directly on the motor shaft 24.The said counter shaft 20 is mounted within the said bracket 18, theupper end running within the bearing screw 25. The main bearing howeverfor the said counter shaft 20 is the relatively long hearing 26 alongthe central portion of its length, which is made of babbitt and extendsthe entire length of the said shaft 20 Y es-t between the said spiralgear 21 at the up per end and the said worm wheel 22 at the lower end.The said spiral gear 21 and the said worm wheel 22 are keyed to theshaft 20 in any ordinary manner, the worm wheel 22 being removably heldin position by the nut 27 at the lower end ofthe shaft 20. The worm 23is mounted on the motor shaft 24, so as to be free to movelongitudinally along the same in any ordinary manner as by means of afeather and slot.

Integral with the worm 23 on each side of the worm proper are providedcylindrical bearing portions which serve as the bearings for the rearend of the motor shaft 24 so far as ordinary rotative motion isconcerned, suitable bearings for the same being mounted in the bearingframe 11 of the motor B, the outer bearing 28 consistin essentially of acylindrical collar held in place by a set screw 29, whereas the innerbearing 30 has an outwardly extending annular flange, between whichflange and the worm 23 is placed a thrust bearing consisting of acomplete ball bearing 31. The outer diameter of the said cylindricalcollar comprising the outer bearing 28, as shown in Fi 5, is not lessthan the outer diameter 0 the said worm 23.

Compactness of construction is secured by having the shafts of theelectric motor and the meat cutter, parallel and in a plane at a slightangle from the vertical, and arranging the ear shaft in a vertical planeat right ang es to the plane in which the shafts of the motor and meatcutter are located and diagonally across the same, the spiral gear atthe upper end of the gear shaft on one side and the worm wheel at thelower end of the gear shaft on the other side, and this is theconstruction which we prefer. In special cases however a differentarrangement from that described may be more suitable, as for instance,with the spiral ear and the worm wheel on the same side 0 the plane ofthe motor and meat cutter shafts, and also with the gear shaft vertical.The said bracket 18, carrying the bearings for the driving gear 17 andthe gear shaft 20, has a pocket 32 for oil or grease, and is mounted onthe base plate 0 by means of screws 33, passing upwardly through thesaid base plate C, and together with the cap 19 attached thereto by thescrews 35 effectively incloses the entire driving mechanism above thebase plate C. Combined with the protection afforded for the motor by thebase plate C and its downwardly projecting protecting flanges, theentire exterior of the driving mechanism is completely concealed, andprotected against liability to injury or accident and has advantagesfrom a sanitary standpoint, both as regards features of dust and dirtagitated by the driving mechanism and from the facility for cleaning theexterior. If desired it is safe to turn a hose on the exterior or resortto other vigorous methods for cleaning the same.

While in the description of the apparatus given herewith a meat cutterhas been included as one of the elements, it is apparent from the factthat the said meat cutter is essentially complete and self contained andremovably mounted in operative position that the same motive and drivingmechanism may be employed to drive any other complete and self containedmachine or apparatus adapted to replace the said meat cutter, eithertemporarily or permanently. It is our purpose to have the same soemployed in connection with apparatus in cases where there may bereasonable objection to the exposure of power and transmission mechanismwhether from the standpoint of danger to operatives, for sanitaryreasons, or on the grounds of nuisance or for whatsoever the reason maybe. Particularly we have in mind the use of the same for driving coffeemills and for driving domestic machinery such as may be used in thekitchen or laundry.

We claim as our invention:

1. In combination, a power transmission mechanism comprising a baseplate and transmission gearing, a machine, and a locking screw, saidbase plate being provided with a threaded hole adapted to receive saidlocking screw, said machine being provided with a recess adapted toregister and engage with the said locking screw and thereby secure saidmachine to said base.

2. In a power transmission mechanism, a base plate adapted to receive amotor on the bottom side and a machine on the top side having their axesof revolution in the same plane, and transmission gearing adapted tooperatively connect said motor and said machine, and comprising acounter shaft constituting a vpart of said gearing and locateddiagonally across said plane.

3. In a power transmission mechanism, gearing, and a shaft, the end ofsaid shaft having three parts, respectively an inner cylindrical part ofrelatively large diameter, an intermediate part with squared sides, andan outer cylindrical part of small diameter, the said gearing adapted toreceive the said end of said shaft and engage with the said part withsquared sides.

4. In a power transmission mechanism, a hollow driving gear, the hollowinterior of which has three parts respectively an outer cylindrical partof relatively large diameter, an intermediate part with squared sidesand an inner cylindrical part of relatively small diameter.

5. In a power transmission gearing, a driving gear comprising ashell-like structure having an exterior made up of three parts,respectively two cylindrical bearing parts, one at each end, and a gearproper intermediate thereto, and having an interior provided with meansfor operative connection with a shaft.

6. In a power transmission mechanism, a base, a pair of gears comprisinga driven gear and an intermediate gear, the said driven gear havingbearings, a counter shaft having ends, bearings intermediate the saidends, the said intermediate gear being located at one of said ends, aworm wheel at the other of the said ends, and a bracket, the saidbracket serving as a complete means of support for all of said bearings.

7. In combination a motor, a power transmission mechanism comprising ahorizontal base plate provided with lateral flanges, a bracket mountedon said base plate, a cap for said bracket, a countershaft passingdiagonally through said base plate, means for mounting said motor on thebottom of said base plate and within said flanges, a driving gear abovesaid base plate and means for cooperating with said countershaft toconnect the motor and driving gear, the said driving gear and the upperend of said countershaft being inclosed by said bracket and cap.

8. A power transmission mechanism comprising a worm and bearingstherefor, said worm being adapted to receive a shaft and havingexteriorly three parts comprising respectively the worm part properinterposed between cylindrical bearing parts at the ends, said bearingsfitting said cylindrical bearing parts, one of said bearings beingannular in exterior formation, removable and of outside diameter notless than the extreme diameter of the said worm part proper.

9. In combination, a power transmission mechanism and a motor havingbearings, said power transmission mechanism having a worm adapted toreceive internally the shaft of said motor and provided at its ends withcylindrical bearing parts and bearings for said cylindrical bearingparts, the said latter bearings being adapted to serve as said bearingsfor said motor shaft.

10. In a power transmission mechanism a worm, a thrust ball bearing, aremovable axial bearing and a bearing supporting bracket, the said wormhaving a cylindrical end adapted to be received by the said ball bearingand to fit and run in said removable axial bearing, the said removablebearing having a cylindrical body and a flanged end, the saidcylindrical body fitting and adapted to be received by the said bracketwith the said flanged end in abutment between the same and the said ballbearing.

11. In combination with a motor, a machine and power transmissiqnmechanism machine as desired, and comprising a base, comprislng meansfor cperatively connecta bracket and a cap. ing and for disconnectingsaid motor and HERBERT Vv SPELLMAN said machine, means for inclosingsaid motor 5 and mechanism, said means being essentially CLARENCEOLMSTED' permanent and fixed and permitting freely Witnesses: andunrestrictedly such operative connec- P. V. GUIBERSON, tion anddisconnection of said motor and R. T. COWAN.

